Consider the reaction C12 H22O1 (s) +1202 (g)+12C02 (g)+ 11H20(1) in which 10.0 g of sucrose, C12 H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/ C. The temperature increase inside the calorimeter was found to be 22.0 °C. Calculate the change in internal energy, AE, for this reaction per mole of sucrose. Express the change in internal energy in kilojoules per mole to three significant figures. • View Available Hint(s) kJ/mol AE = Submit Previous Answers

Chemistry for Engineering Students
3rd Edition
ISBN:9781285199023
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.79PAE: A student performing a calorimetry experiment combined 100.0 ml. of 0.50 M HCI and 100.0 ml. of 0.50...
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Chapter 6 Ubjectives
+ Calorimetry
27 of 42
Constants Periodic Table
A calorimeter is an insulated device in which a
chemical reaction is contained. By measuring the
temperature change, AT, we can calculate the
heat released or absorbed during the reaction using
the following equation:
Consider the reaction
C12 H22 O11 (s) + 1202 (g)+12C02 (g) + 11H20(1)
in which 10.0 g of sucrose, C12 H22011, was burned in a bomb calorimeter with a heat capacity of 7.50
kJ/ C. The temperature increase inside the calorimeter was found to be 22.0°C. Calculate the change in
internal energy. AE, for this reaction per mole of sucrose.
q= specific heat x mass x AT
Or, if the calorimeter has a predetermined heat
capacity, C, the equation becomes
Express the change in internal energy in kilojoules per mole to three significant figures.
• View Available Hint(s)
q = C x AT
At constant pressure, the enthalpy change for the
reaction, AH is equal to the heat, qpi that is,
AH= qp
kJ/mol
AE =
but it is usually expressed per mole of reactant and
with a sign opposite to that of q for the
surroundings. The total internal energy change,
AE (sometimes referred to as AU), is the sum of
heat, g, and work done, w:
Submit
Previous Answers
* Incorrect; Try Again; 18 attempts remaining
AE = q+ w
However, at constant volume (as with a bomb
calorimeter) w =0 and so AE = qu.
Next>
Provide Feedback
3.28
Transcribed Image Text:Chapter 6 Ubjectives + Calorimetry 27 of 42 Constants Periodic Table A calorimeter is an insulated device in which a chemical reaction is contained. By measuring the temperature change, AT, we can calculate the heat released or absorbed during the reaction using the following equation: Consider the reaction C12 H22 O11 (s) + 1202 (g)+12C02 (g) + 11H20(1) in which 10.0 g of sucrose, C12 H22011, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/ C. The temperature increase inside the calorimeter was found to be 22.0°C. Calculate the change in internal energy. AE, for this reaction per mole of sucrose. q= specific heat x mass x AT Or, if the calorimeter has a predetermined heat capacity, C, the equation becomes Express the change in internal energy in kilojoules per mole to three significant figures. • View Available Hint(s) q = C x AT At constant pressure, the enthalpy change for the reaction, AH is equal to the heat, qpi that is, AH= qp kJ/mol AE = but it is usually expressed per mole of reactant and with a sign opposite to that of q for the surroundings. The total internal energy change, AE (sometimes referred to as AU), is the sum of heat, g, and work done, w: Submit Previous Answers * Incorrect; Try Again; 18 attempts remaining AE = q+ w However, at constant volume (as with a bomb calorimeter) w =0 and so AE = qu. Next> Provide Feedback 3.28
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